math-to-itex.rb in math-to-itex-0.6.1

- old
+ new
@@ -1,52 +1,57 @@
-require "math-to-itex/parser"
-require "math-to-itex/support_parens"
-require "math-to-itex/version"
+# frozen_string_literal: true
 
+require 'math-to-itex/parser'
+require 'math-to-itex/version'
+
 module MathToItex
+  class Math
+    def initialize(string)
+      @string = string
+    end
 
-  def self.parens(string)
-    @string = string
-    self
-  end
+    def convert(&block)
+      @string.gsub(MathToItex::Parser::REGEX) do |maths|
+        if /\A\$(?!\$)/.match?(maths)
+          just_maths = maths[1..-2]
+          type = :inline
+        elsif /^\\\((?!\\\()/.match?(maths)
+          just_maths = maths[2..-3]
+          type = :inline
+        elsif /\A\$\$/.match?(maths)
+          just_maths = maths[2..-3]
+          type = :display
+        elsif /\A\\\[(?!\\\[)/.match?(maths)
+          just_maths = maths[2..-3]
+          type = :display
+        elsif /\A\\begin{equation}(?!\\begin{equation})/.match?(maths)
+          just_maths = maths[16..-15]
+          type = :display
+        elsif /\A\\begin{math}(?!\\begin{math})/.match?(maths)
+          just_maths = maths[12..-11]
+          type = :inline
+        elsif /\A\\begin{displaymath}(?!\\begin{displaymath})/.match?(maths)
+          just_maths = maths[19..-18]
+          type = :display
+        elsif /\A\\begin{#{MathToItex::Parser::JOINED_ENVIRONMENTS}}(?!\\begin{#{MathToItex::Parser::JOINED_ENVIRONMENTS}})/.match?(maths)
+          just_maths = maths
+          type = :display
+        end
 
-  def self.convert(&block)
-    @string.gsub(MathToItex::Parser::REGEX) do |maths|
-      if maths =~ /\A\$(?!\$)/
-        just_maths = maths[1..-2]
-        type = :inline
-      elsif maths =~ /^\\\((?!\\\()/
-        just_maths = maths[2..-3]
-        type = :inline
-      elsif maths =~ /\A\$\$/
-        just_maths = maths[2..-3]
-        type = :display
-      elsif maths =~ /\A\\\[(?!\\\[)/
-        just_maths = maths[2..-3]
-        type = :display
-      elsif maths =~ /\A\\begin{equation}(?!\\begin{equation})/
-        just_maths = maths[16..-15]
-        type = :display
-      elsif maths =~ /\A\\begin{math}(?!\\begin{math})/
-        just_maths = maths[12..-11]
-        type = :inline
-      elsif maths =~ /\A\\begin{displaymath}(?!\\begin{displaymath})/
-        just_maths = maths[19..-18]
-        type = :display
-      elsif maths =~ /\A\\begin{#{MathToItex::Parser::JOINED_ENVIRONMENTS}}(?!\\begin{#{MathToItex::Parser::JOINED_ENVIRONMENTS}})/
-        just_maths = maths
-        type = :display
-      end
+        # this is the format itex2MML expects
+        all_maths = if type == :inline
+                      "$#{just_maths}$"
+                    else
+                      "$$#{just_maths}$$"
+                    end
 
-      # this is the format itex2MML expects
-      if type == :inline
-        all_maths = "$#{just_maths}$"
-      else
-        all_maths = "$$#{just_maths}$$"
-      end
+        next(all_maths) if block.nil?
 
-      next(all_maths) if block.nil?
-
-      yield all_maths, type, just_maths
+        yield all_maths, type, just_maths
+      end
     end
   end
+end
+
+def MathToItex(string)
+  MathToItex::Math.new(string)
 end